f Number to Numerical Aperture Conversion

Calculator

    Numerical Aperture (NA) - Object Side
    Magnification (ImageSize / ObjectSize)
    f Number (f#)

    f Number (f#)
    Magnification (ImageSize / ObjectSize)
    Numerical Aperture (NA) - Object Side

f Number = Magnification / (2*Tan(Arcsin(Numerical Aperture)))

Numerical Aperture= Sin(Atan(Magnification / (2 * f Number)))